Finding the Fourth Proportional to 123,841.11, 170,905.89 and 72,856.23

Step by Step Solution

1. Step 1: Write the proportion equation
   123,841.11 : 170,905.89 = 72,856.23 : x
2. Step 2: Convert to fraction form
   123,841.11/170,905.89 = 72,856.23/x
3. Step 3: Cross multiply
   123,841.11x = 170,905.89 × 72,856.23
4. Step 4: Simplify right side
   123,841.11x = 12,451,558,830.19
5. Step 5: Solve for x
   x = 12,451,558,830.19/123,841.11
6. Step 6: Final answer
   x = 100,544.63